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lib/ashldi3.c 541 Bytes
588cb88ce   Thomas Gleixner   treewide: Replace...
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  // SPDX-License-Identifier: GPL-2.0-or-later
b35cd9884   Palmer Dabbelt   lib: Add shared c...
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  /*
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   */
  
  #include <linux/export.h>
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  #include <linux/libgcc.h>
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  long long notrace __ashldi3(long long u, word_type b)
  {
  	DWunion uu, w;
  	word_type bm;
  
  	if (b == 0)
  		return u;
  
  	uu.ll = u;
  	bm = 32 - b;
  
  	if (bm <= 0) {
  		w.s.low = 0;
  		w.s.high = (unsigned int) uu.s.low << -bm;
  	} else {
  		const unsigned int carries = (unsigned int) uu.s.low >> bm;
  
  		w.s.low = (unsigned int) uu.s.low << b;
  		w.s.high = ((unsigned int) uu.s.high << b) | carries;
  	}
  
  	return w.ll;
  }
  EXPORT_SYMBOL(__ashldi3);